Filling trenches in concrete basement floor

My friend just had some plumbing done in her new home. She had some drains for a bath and a sink placed in the floor connecting them into the main drain.

The contractor left wide trenches (1 foot wide) where he dug up the concrete and laid down the drain pipe. He put the pipes in a bed of sand, then put sheets of plastic over the whole thing. Now I have several feet of these trenches.

How do I fill and repair the trenches? Just mix up some concrete and put 'er down, or what?

Advertisement

Filling trenches in concrete basement floor

Option 1, call the contractor back to fill the trenches.
Option 2, you play contractor for the day, and fill the trenches with bag mix concrete (sakrete).
Option 3, the owner plays contractor for the day and fills the trenches with Sakrete.
Option 4, you leave the trenches, they are not likely to get any deeper on their own.

Advertisement

The Following User Says Thank You to Daniel Holzman For This Useful Post:

Filling trenches in concrete basement floor

Not clear on what the plumber left you with. You don't want to surround any piping or fixtures with any concrete. The piping needs to be buried in sand up to its previous level below the existing floor. Then fill the rest with mixed concrete and smooth it off even with the existing surface.

Filling trenches in concrete basement floor

Quote:

Originally Posted by Bud Cline

Not clear on what the plumber left you with. You don't want to surround any piping or fixtures with any concrete. The piping needs to be buried in sand up to its previous level below the existing floor. Then fill the rest with mixed concrete and smooth it off even with the existing surface.

Good to know.
I will make sure the pipes are buried in sand, then fill and level the trenches with concrete mix.